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(共20张PPT)
Unit 5 Water is life
主题范畴：
人与自然
主题群：
环境保护
子主题：
环境污染及原因，环保意识和行为
Key question
What does water mean to us
Improve my listening comprehension skills by predicting key words and content before listening;
Identify and understand important details in the spoken text about water, such as “drinkable”, “undrinkable” and “surface”;
Raise awareness about the importance of saving water by discussing ways to use water wisely.
Learning objectives 学习目标
At the end of the class, I’ll be able to:
New words and phrase
bath /bɑ:θ/ n. 洗澡；洗浴
salt /s :lt/ adj. 含盐的；咸的
brain /bre n/ n. 脑
drinking water 饮用水
Warm-up
A quiz about water
Section 1 Experiencing and understanding language
1. The World Water Day is on ____.
a. March 22nd
b. March 12th
c. May 22nd
2. Water covers almost ____ of the Earth.
a. 1/4 b. 1/2 c. 3/4
3. Water makes up about ____ of the human body.
a. 80% b. 60% c. 40%
4. One gallon (加仑) of water is the same as ____ litres (升) of water.
a. 1 b. 3.785 c. 2.785
drinkable
undrinkable
词根助记：-able 能够的； un- 否定前缀
1. Look at the pictures and learn the words and phrases.
The water on the left is _______________,
while that on the right is _______________.
undrinkable
drinkable
bath / take a bath
shower / take a shower
Can you tell me which one you prefer, a bath or a shower Why
tap
drinking water
surface / s f s/ n. 表面
Pre-listening
Predict the possible answers to the following questions.
What percentage of the Earth’s surface is water
Is the majority of the water on Earth fresh water or salt water
What role does water play in the human body
While-listening
2. Listen to a podcast about water and write down the topics mentioned in it.
1 ________________________
2 ________________________
3 ________________________
The water on Earth
The water in the human body
Ways to save water
3. Listen again and complete the notes below.
70
3
97
0.5
60
75
a few days
2 to 3
wash clothes and take baths
Tapescript
Post-listening
Good evening and welcome to this week’s episode of The Natural World. I’m Rebecca, and tonight we’ll be talking about water. About 70% of the Earth’s surface is covered by water, but 97% of it is salt water, which is not drinkable. Only about 3% of the water on Earth is fresh water, and most of that is locked up in ice. So, only about half a percent of Earth’s water is usable for drinking. Clean and safe drinking water is hard to find in many places.
usable 可用的；unusable 不可用的
useful 有用的；useless 无用的
be covered by 被……覆盖
Water is essential because most of the human body is made of water — around 60% in an average adult. Some parts of the body contain even more, like the brain, which is about 75% water. While humans can survive for weeks without food, we can only live a few days without water. We need around 2 to 3 litres of water per day, and athletes usually need more. In hot weather, people also require more water.
essential 重要的 = important
require sth. 寻求某物
require sb. to do sth. 要求某人做某事
while 然而（连词，表示对比）
I like tea, while my friend prefers coffee.
我喜欢茶，然而我的朋友喜欢咖啡。
However, much of the water we use goes into activities like washing clothes and taking baths. To save water, consider taking a quick shower instead of a bath, and remember to turn off the tap while brushing your teeth. This simple action can save over 100 litres of water in a week.
consider doing sth.
考虑做某事
instead of doing sth
代替；而不是
turn off 关掉
turn on 打开
turn left / right 向左/右转
turn up 出现
Complete the sentences.
1) I consider ______(do) my homework before playing video games.
2) He turned ______ the music because it was too loud.
3) Our school ______(require) us ______(wear) uniforms every day.
4) You should eat vegetables ______ ______ junk food to stay healthy.
doing
off
requires
to wear
instead of
How can we use water wisely
Your speech can begin like this:
Water is very important, and we need to use it wisely. Here is some of my advice.
At home, we can save water by ... For example, we should ... We can also ... instead of ...
In conclusion, we should save water both at home/at school. Let’s all work together to save water!
4. Discuss the question below in pairs. S1 focused on advice at home while S2 focused on that at school.
Discussion
Turn off the tap while brushing your teeth.
Take shorter showers instead of long ones.
Fix dripping taps immediately to prevent wasting water.
Use a bucket to wash the car instead of using a pipe.
Water the plants early in the morning or late in the evening to reduce evaporation (蒸发).
At home
some possible answers
At school
Turn off the tap after washing your hands.
Tell the teacher or staff if you see any water leaking (漏水).
Don’t waste water when cleaning the classroom.
Encourage your classmates to use water carefully.
Use a cup to drink water instead of leaving the tap running (流).
Thank you!

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